KR20110126790A

KR20110126790A - Eco reinforced earth retaining wall a method of construction

Info

Publication number: KR20110126790A
Application number: KR1020100046243A
Authority: KR
Inventors: 이양석
Original assignee: (주)에스오씨산업
Priority date: 2010-05-18
Filing date: 2010-05-18
Publication date: 2011-11-24

Abstract

PURPOSE: An environment-friendly reinforced earth retaining wall system is provided to improve stability and environment-friendly property. CONSTITUTION: An environment-friendly reinforced earth retaining wall system is composed like next. A base excavation process is performed after the installation of a reinforced earth retaining wall. A weak soil foundation reinforcing material secures supporting force after the base excavation. A vegetative mat(30), in which plant can grow, is fixed on the front surface of the triangle steel form. A reinforced earth(40) is filled and stepped on the rear-side section of the triangle steel form. Soil covers on top the front surface of the vegetative mat.

Description

Eco-friendly reinforced earth retaining wall a method of construction

The present invention relates to an environmentally friendly reinforcement earth retaining wall method, and more particularly, by constructing a reinforcement earth retaining wall by vegetation mat and triangle steel foam, it is composed of a reinforcement earth reinforcement to be built into a natural and environmentally friendly structure, geosynthetic reinforcement material Due to the stability of the reinforcement soils, and thereby relates to the environment-friendly reinforced earth retaining wall construction method with excellent stability and aesthetics and eco-friendliness.

In general, the retaining wall was a method of forming a retaining wall structure with reinforced concrete to ensure stability by resisting earth pressure by the weight of the main body and the rigidity of the reinforcing steel. There was a lack of friendliness.

This resulted in the development of block type reinforced earth retaining wall blocks considering the economics and aesthetics of reinforced concrete retaining walls. As a ready-made product, it is easy to install and the same work is repeatedly performed, so it is possible to shorten the air, thereby making it economical and easy to install.

In the early days, the walls were neat and aesthetically diverse, and arbitrary curves and colors could be used to construct structures of various shapes, but after a long period of time, it was not environmentally friendly due to the characteristics of concrete and problems in the surrounding environment. Getting

In addition, the revetment block, which is mainly used for rivers, was initially constructed mainly on the stability and aesthetics of the revetment, but now it is replaced by an ecological block from an ecological block to an ecological restoration for ecological restoration in consideration of the surrounding conditions and eco-friendly aspects. It is always doing.

This focuses on the ecological function of rivers in river maintenance and management, and can be seen to include more specific ecological recovery of rivers.

As such, we tried to design eco-friendly reinforcement earth retaining wall utilizing the advantages of the existing block-type reinforcement earth retaining wall and vegetation mat, but the vegetation mat has the disadvantage of deriving the problem of design phase that cannot be used because it is not easy to install on the retaining wall of the straight wall. .

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art,

Reinforcement soil retaining wall is constructed by vegetation mat and triangle steel foam, and it is composed of green reinforced soil structure, which is made of natural and eco-friendly structure, and the stability of reinforcement soil is secured by geosynthetic reinforcement material. The purpose is to provide an excellent eco-friendly reinforced earth retaining wall method.

In order to achieve the above object, the present invention is an environmentally friendly reinforced soil retaining wall method,

A foundation bottoming step of a position where a reinforcement soil retaining wall is to be installed and a foundation bottom laying step of securing a supporting force by laying a soft ground treatment reinforcement after the foundation trenching (S100);

After the foundation trench and foundation bottom composition (S100), the step of installing a triangle steel foam in which the front surface is inclined at a predetermined angle (θ) on the front of the foundation trench (S200);

After the installation of the triangle steel form (S200), the step of fixing the reinforcement formed in a grid pattern form to bind the fixing of the triangle steel form and the reinforcing soil to be mutually fixed (S300);

Fixing the vegetation mat in which plants can grow on the front of the triangle steel form at the same time as the reinforcement fixing installation (S300);

After the installation of the reinforcing material and vegetation mat (S300, S400), the step of backfilling and backfilling the reinforcement to the rear portion of the triangle steel foam (S500);

After the reinforcement soil backfill and backfill compaction (S500), the installation of triangle steel foam in multiple stages on the upper surface of the reinforcement soil (S200)-reinforcement and vegetation mat fixed installation (S300, S400)-reinforcement soil refill and backfill compaction (S500) Step S600;

After the repetitive construction (S600), the step of covering and finishing high-quality earth and sand on the front surface of the vegetation mat as a whole (S700); relates to an environmentally friendly reinforced soil retaining wall method comprising a.

As described above, the eco-friendly reinforcement earth retaining wall method of the present invention is constructed by the reinforcement earth retaining wall by vegetation mat and triangle steel foam, consisting of the reinforcement earth reinforcement is built into a natural and eco-friendly structure, geosynthetic reinforcement As a result, the stability of the reinforcement soil is secured, thereby having an excellent effect on stability and aesthetics and eco-friendliness.

1 is a schematic view showing the foundation trench and foundation bottom composition according to an embodiment of the present invention,
Figure 2 is a schematic diagram showing a triangle steel foam installation according to an embodiment of the present invention,
Figure 3 is a schematic diagram showing the installation of the reinforcing material and vegetation mat according to an embodiment of the present invention,
4 is a schematic view showing a backfill and backfill compaction according to an embodiment of the present invention,
5 is a schematic diagram showing an iterative process according to an embodiment of the present invention,
6 is a schematic view showing the completion according to an embodiment of the present invention,
7 is a flow chart showing an environmentally friendly reinforced soil retaining wall method according to an embodiment of the present invention,
8 is a perspective view showing the vegetation mat and triangle steel foam and the reinforcing material according to an embodiment of the present invention,
Figure 9 is a cross-sectional view showing a vegetation mat and triangle steel foam and the reinforcing material according to an embodiment of the present invention.

The present invention has the following features to achieve the above object.

The present invention is an environmentally friendly reinforced soil retaining wall method,

After repeating the construction (S600), the step of covering the earth and sand of good quality on the front surface of the vegetation mat as a whole (S700); characterized in that it comprises a.

The present invention having such characteristics can be more clearly described by the preferred embodiments thereof.

Before describing the various embodiments of the present invention in detail with reference to the accompanying drawings, it can be seen that the application is not limited to the details of the configuration and arrangement of the components described in the following detailed description or shown in the drawings. will be. The invention may be embodied and carried out in other embodiments and carried out in various ways. It should also be noted that the device or element orientation (e.g., "front," "back," "up," "down," "top," "bottom, Expressions and predicates used herein for terms such as "left," " right, "" lateral, " and the like are used merely to simplify the description of the present invention, Or that the element has to have a particular orientation. Also, terms such as " first "and" second "are used herein for the purpose of the description and the appended claims, and are not intended to indicate or imply their relative importance or purpose.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

1 is a schematic diagram showing the foundation trench and foundation bottom composition according to an embodiment of the present invention, Figure 2 is a schematic diagram showing a triangle steel foam installation according to an embodiment of the present invention, Figure 3 is an embodiment of the present invention Figure 4 is a schematic diagram showing the installation of the reinforcing material and vegetation mat, Figure 4 is a schematic diagram showing the backfill and backfill according to an embodiment of the present invention, Figure 5 is a schematic diagram showing a repeating process according to an embodiment of the present invention And, Figure 6 is a schematic diagram showing the completion according to an embodiment of the present invention, Figure 7 is a flow chart showing an environmentally friendly reinforced earth retaining wall method according to an embodiment of the present invention, Figure 8 is an embodiment of the present invention 9 is a perspective view illustrating the vegetation mat and the triangle steel foam and the reinforcement, Figure 9 is a cross-sectional view showing the vegetation mat and triangle steel foam and the reinforcement according to an embodiment of the present invention.

As shown in Figures 1 to 7, the environmentally friendly reinforcement earth retaining method of the present invention is a natural and environmentally friendly structure consisting of the reinforcement of the reinforcement of the greenery, will be described in detail below. Here, the reinforcement soil (REINFORCED EARTH, 40), the original soil itself does not have a tensile strength as a discontinuous body. In this backfilling soil, reinforcement materials with strong tensile force (metals, geotextiles, wood, etc.) are placed at appropriate intervals to reinforce the soil, causing adhesion between the soil and the reinforcement material to increase the adhesion or internal stress of the reinforcement soil. REINFORCED EARTH, 40).

First, as shown in FIG. 1, the foundation trench is carried out using equipment 80 such as B / H (backhoe), excavator, etc. in consideration of the retaining wall linearity and the depth of incidence depth of the design drawing at the position where the reinforcement soil retaining wall is to be installed. . At this time, the depth of the foundation trench is designed and determined by the depth of ingress of the retaining wall and the thickness of the foundation.

After the foundation burrow, check whether the actual condition of the ground meets the conditions used in the design, and if the foundation floor does not have the required strength, remove it and replace it with good soil or use the soft ground treatment reinforcement. (S100) At this time, the base bottom is leveled to secure the space required for the backfill material with good drainage, and compacted with compact compacting equipment (80) 20-30 times after the foundation ground Review the stability.

Then, as shown in FIG. 2, a triangular steel form (10) having a front surface inclined at a predetermined angle (θ) is installed on the front of the foundation trench (S200), and the triangle steel form 10 is shown in FIG. As shown in FIG. 9, the support 11 is formed in a triangular shape and a pedestal 12 connected to the support 11. At this time, the material of the steel used in the triangle steel foam (10) should be resistant to corrosion as a product of KS D 3504 (bars for reinforced concrete) and galvanized, suitable for the provisions of KS D 8308, the triangle The plated surface of the steel foam 10 is practically smooth, has no unplated or harmful defects, and the coating of the plate adheres well to the material, does not peel off or crack by normal handling, and is PVC coated in a secondary manner in addition to galvanizing. Use the product.

Here, the support 11 is installed a plurality of symmetrically spaced apart from each other, the bottom portion supported on the base bottom, both ends of the bottom portion is formed integrally inclined at a predetermined angle (θ), respectively, the end portion It consists of a front part and a back part which are mutually connected.

In addition, the pedestal 12 is connected between the support 11 and the support 11, and also serves to fix a plurality of supports 11, connected to the front of the support 11 in a grid form vegetation mat (30) and connected to the bottom of the support (11) in the form of a lattice to install a reinforcement, vegetation mat is installed on the bottom with SOC fixing pins to the bottom of the triangle steel foam (10) reinforcement, vegetation mat on the base Fix it.

Then, as shown in Figure 3, the reinforcement 20 and the vegetation mat 30 is fixedly installed, the reinforcement (referred to as geogrid (GEO-GRID, SCGD), hereinafter referred to as geogrid 20)). As shown in Fig. 8, the soil is introduced into the lattice material through the lattice, thereby binding the reinforced earth materials to each other to maximize the frictional force. Therefore, the geogrid (SCGD) 20 has a strong resistance to sliding, and also serves to prevent unequal settlement by the equal distribution of loads. In addition, P.P, PET, and HDPE, which are materials of the geogrid (SCGD, 20), are excellent in creep resistance and are not affected by ambient temperature and microorganisms.

In addition, the geogrid 20 is installed horizontally on the stiffened reinforcement soil 40 and is installed so that the longitudinal direction is perpendicular to the retaining wall, and installs the geogrid 20 at a predetermined position, the geogrid 20 of the rear portion Pull the geogrid 20 to prevent wrinkles and temporarily fix the geogrid 20 with a fixing pin (not shown). (S300) In this case, when the geogrid 20 is installed below the base plate, the geogrid 20 is lowered. Dig more than 10cm and reinforce the reinforcement soil 40.

The vegetation mat 30 is a vegetation mat that can grow plants, is fixed to the front of the triangle steel foam 10 (S400), the fixing pin 60 is used to fix the vegetation mat 30 is used The fixing pin 60 has an upper portion formed in a ring shape and penetrates the upper surface of the vegetation mat 30 to be grounded, and the upper ring portion has a vegetation mat 30, a geogrid 20, and a triangle steel foam 10. If the soil in the construction area is poor, smooth the conditions of the planting site with soil improver (lime, etc.) or loam, and the connecting parts of the vegetation mat 30 are overlapped so as not to be separated. It should be laid and the overlapping area should be 50mm or more, and when the unevenness is severe, it should be overlapped by 50mm ~ 100mm. At this time, the design specifications such as soil improvement, construction materials, fertilizers, grass selection (two or more) are determined by measuring the soil, pH or soil trace elements of the soil at the construction site.

Here, the vegetation mat 30 is directly supported on the front portion of the triangle steel foam 10, as shown in Figures 8 and 9, is formed in the form of a grid to prevent erosion on the reinforcement soil 40 of the backfill An erosion prevention mat 31; A vegetation seed mat 32 provided on an upper surface of the erosion prevention mat 31 and to which a vegetation seed is attached; It is configured to include a loss prevention mat 33 provided on the upper surface of the vegetation seed mat 32 to prevent the attached vegetation seeds are lost.

In addition, in the factory production of the vegetation mat 30, it is necessary to determine the size of one roll (roll) to be convenient for construction and to achieve the required purpose to the maximum, the shape is excellent in filtration performance and the outflow of fine grain soil At the same time, the product should be excellent in cushioning function during construction, and should be made of synthetic fiber or natural fiber. It should be alkali-resistant, and should be soil-free and durable because it does not cause chemical reaction with soil when laying in soil. It must contain or have the same function to prevent the sediment of reinforcement soils from leaking, and if it contains the material, the material should be environmentally friendly material that decomposes naturally after eating.

At this time, the structure of the vegetation mat 30 should be in the shape of a mesh entangled with a strong and good elasticity, should have a structure excellent in soil retention capacity, adaptability to slope bending, integral of slope and mat In order to improve the performance, it is a product with high elongation and weight with physical strength and proper thickness.

And, in order to promote the germination of the seeds attached to the vegetation seed mat 32 and to improve the penetration of the deposit well, in order to spray the appropriate amount of water, when the seeds are mixed in the vegetation mat 30, the seeds germinate The water should be sprayed properly until it is possible, and the optimal condition is maintained such that the soil covered is not washed away until germination. In addition, after the construction of the vegetation mat 30 so that the growth state of the vegetation is maintained satisfactorily until the construction is completed.

Here, the seeds (seeds) of the vegetation mat 30 should have high germination rate and apply perennial, select species that are advantageous for growth characteristics on the application of herbaceous plants, and select various species to have excellent naturalness during germination and growth. In other words, the useful life of vegetation seeds is collected within at least two years. In addition, the germination rate should be 65% or more, the net rate should be 95% or more, the seeds should have a unique color and gloss, and the seeds are based on the mixed seed 20-30g / ㎡.

The order of installation of the triangle steel foam 10 and the geogrid 20 described above may be changed according to the environment and the construction site.

Then, as shown in Figure 4, in the state in which the triangle steel foam 10 and the geogrid 20 is installed, backfilling and backfilling the reinforcement soil 40 on the rear portion (rear) of the triangle steel foam 10, and then compacted (S500) In this case, the reinforcement soil 40 used in the backfilling and backfilling is used in principle, but if the designer does not meet the following Table 1 by reviewing the suitability of the supervisor before construction, Design changes or replacement should be made with appropriate loading.

Particle size Passing weight percentage Remarks 19 mm 100% Internal friction angle by triaxial compression or direct shear test should be more than 25 degrees. If it is less than 25 degrees, it should be approved by the supervisor. 0.425 mm (40th sieve) 0 to 60% 0.075mm (No.200 sieve) 0 to 15% Exemptions (if more than 15% of 200 passes) below 10 Internal friction angle is 25 degrees or more, predetermined index (PI) 6 or less 10 to 20%

1) sandy soil with large friction effect between soil and reinforcement

2) Soil having good drainage and less change in strength due to the change in water content

3) Soil with good particle size distribution

4) Soil with little chemical composition that reduces the durability of reinforcement

Here, in the backfill and backfill, the reinforcement soil 40 at the top of the geogrid 20 should be used with good drainage, and the thickness of one layer of compaction should be based on the height of the block end but should not exceed 20 cm.

In addition, the compaction of the reinforcement soil 40 compacts the compaction equipment within 1 ton within 1 m of the first half of the block, and compacts the vibration compaction equipment using more than 4.4 tons of vibration compaction equipment after 1.0 m. The compaction should be refrained from rapid braking and rapid rotation, the number of compaction should be more than 6 times, the compaction degree should be more than 90% of the maximum dry density, the construction of the overlapping geogrid 20 is at least 7 cm thick soil between grids After installation in the pledge

As such, after the reinforcement soil 40 backfill and backfill compaction (S500), as shown in Figure 5 and 6, the installation of the above-described triangle steel foam 10 in multiple stages on the upper surface of the reinforcement soil 40 (S200)-reinforcement ( 20) and the vegetation mat (30) fixed installation (S300, S400)-reinforcement soil (40) backfill and backfill compaction (S500) is repeatedly constructed. (S600)

Finally, as shown in Figure 6, after the construction of the reinforcement soil retaining wall is completed, the top of the reinforcement soil 40 of the upper end and the front surface of the vegetation mat 30 is covered with high quality soil sand 50 to about 10cm to finish. At this time, if necessary, an impermeable layer (not shown) of about 30 cm or more is provided at the upper end, or a side opening is installed along the retaining wall to drain water, or a separate drainage facility (not shown) is installed to minimize water penetration during rainfall.

In addition, when installed in a riverbed or slope, and finishes by installing a separate protective device (not shown) so that the retaining wall foundation is not lost.

10: triangle steel foam 11: support
12: pedestal 20: reinforcement, geogrid
30: vegetation mat 31: erosion prevention mat
32: vegetation seed mat 33: loss prevention mat
40: reinforced soil 50: earth and sand
60: fixed pin 80: equipment

Claims

In eco-friendly reinforced earth retaining wall method,
A foundation bottoming step of a position where a reinforcement soil retaining wall is to be installed and a foundation bottom laying step of securing a supporting force by laying a soft ground treatment reinforcement after the foundation trenching (S100);
After the foundation trench and foundation bottom composition (S100), the step of installing a triangle steel foam (10) in which the front surface is inclined at a predetermined angle (θ) on the front of the foundation trench (S200);
After the installation of the triangle steel foam 10 (S200), the reinforcing member 20 formed in a lattice pattern is fixed to the base bottom so as to bind the fixing of the triangle steel foam 10 and the reinforcement soil 40 to be filled with each other. (S300);
A step of fixing the vegetation mat 30 in which plants can grow on the front side of the triangle steel form 10 at the same time as the reinforcement 20 fixed installation (S300);
After the installation of the reinforcing material 20 and the vegetation mat 30 fixed (S300, S400), backfilling and backfilling the reinforcing soil 40 to the rear portion of the triangle steel foam 10 (S500);
After the reinforcement soil 40 backfill and backfill compaction (S500), the installation of the triangle steel foam 10 in multiple stages on the upper surface of the reinforcement soil 40 (S200)-reinforcement 20 and the vegetation mat 30 fixed installation (S300, S400)-repeating the reinforcement soil 40 backfill and backfill compaction (S500) (S600);
After repeating the construction (S600), the step of covering the earth and sand (50) of good quality on the front surface of the overall vegetation mat (30) to finish (S700);
Eco-friendly reinforced earth retaining wall method characterized in that it comprises a.

The method of claim 1,
In the step (S200), the triangle steel foam 10 is installed,
The triangle steel foam 10,
The bottom portion supported on the base bottom, the front end portion is formed integrally inclined at a predetermined angle (θ) at each end portion of the bottom portion, the end portions are interconnected, and the rear portion is composed of a triangular shape in cross-section, a plurality of mutually symmetrical A support 11 spaced apart from each other;
It is connected between the support 11 and the support 11 to fix a plurality of supports 11, connected to the front of the support 11 in a grid form to support the vegetation mat 30, the support ( A pedestal 12 connected to the bottom of the bottom 11 in a lattice shape and fixed to the base bottom by the connection member with the triangle steel foam 10;
Eco-friendly reinforced earth retaining wall method, characterized in that is configured to include.

The method of claim 1,
In the step of fixing the vegetation mat 30 (S400),
The vegetation mat 30,
An erosion prevention mat 31 directly supported on the front portion of the triangle steel foam 10 and formed in a lattice shape to prevent erosion from the reinforcement soil 40 of the backfill;
A vegetation seed mat 32 provided on an upper surface of the erosion prevention mat 31 and to which a vegetation seed is attached;
A loss prevention mat 33 provided on the upper surface of the vegetation seed mat 32 to prevent the attached vegetation seed from being lost;
Eco-friendly reinforced earth retaining wall method, characterized in that is configured to include.